Set of apparatus for a comprehensive and easily understandable introduction to the basic principles of refraction and reflection of light by means of demonstration or student experiments. The laser can be easily attached via its built-in magnet and aligned on the end of the metal base. The rotating optical disc has an angular scale with 1° divisions and marked lines to position the elements. The set includes a semi-circular disc and an equilateral prism for use in optical experiments, as well as a plug-in mains-adapter power supply and a battery compartment (batteries are not included in the apparatus as supplied).

Diode Laser: 1 beam, Class II
Output power: <1 mW
Wavelength: 635 nm
Operating voltage: 3 V DC
Battery-box: for 2x 1.5 V batteries
(AA, LR6, MN1500, Mignon)
Laser ray box: 80x25x21 mm³
Metal base: 320x40x35 mm³
Optical disc: 250 mm dia.
Semicircular element: 90 mm dia.
Prism: 100 mm equilateral

Available separately:  U21887  Semicircular Cell